Dtc B2786 No Response From Steering Lock Ecu

Power Source Network. Land Cruiser. Urj200, 202 Grj200 Vdj200
Networking. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - STEERING LOCK ECU)

CHECK STEERING LOCK ACTUATOR (BATTERY VOLTAGE AND BODY GROUND)

REPLACE STEERING LOCK ACTUATOR ASSEMBLY

CHECK FOR DTC

DTC B2786 No Response from Steering Lock ECU


DESCRIPTION

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and steering lock actuator (steering lock ECU) stops for 10 seconds or more.

DTC Code
DTC Detection Condition
Trouble Area
B2786
Periodic transmission from the steering lock ECU stops for 10 seconds or more.
  1. Steering lock actuator (Steering lock ECU)
  2. Certification ECU (smart key ECU assembly)
  3. Harness or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B2786 No Response From Steering Lock Ecu


INSPECTION PROCEDURE

NOTICE:
When using the intelligent tester with the ignition switch off to troubleshoot:
Connect the intelligent tester to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
HINT:
DTC B2785 is stored when the communication between the steering lock ECU and certification ECU (smart key ECU assembly) stops.
1.CLEAR DTC

  1. Clear the DTC (Click here).


NEXT


2.CHECK FOR DTC

  1. Recheck for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC B2786 is output
    		A
    DTC B2786 is not output
    		B


B
USE SIMULATION METHOD TO CHECK (Click here)
A


3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - STEERING LOCK ECU)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B2786 No Response From Steering Lock Ecu

  1. Disconnect the E29 and E26 ECU connectors.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E29-10 (LIN) - E26-5 (LIN)
    		Always
    		Below 1 Ω
    E29-10 (LIN) or E26-5 (LIN) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK STEERING LOCK ACTUATOR (BATTERY VOLTAGE AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System. Dtc B2786 No Response From Steering Lock Ecu

  1. Disconnect the E26 ECU connector.

  1. Measure the resistance and voltage according to the value(s) in the tables below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E26-1 (GND) - Body ground
    		Always
    		Below 1 Ω
    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E26-7 (B) - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE STEERING LOCK ACTUATOR ASSEMBLY

  1. Temporarily replace the steering lock actuator with a new or normally functioning one (Click here).

  1. Clear the DTC (Click here).


NEXT


6.CHECK FOR DTC

  1. Recheck for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC B2786 is not output
    		A
    DTC B2786 is output
    		B


B
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
A

END (STEERING LOCK ECU IS DEFECTIVE)